Electric pipette

A pipette, electric technology, used in laboratory appliances, fluid controllers, measuring tubes/pipettes, etc., can solve the problems of high precision requirements for liquid samples and reagents, precious samples, etc., and achieve consistent droplet volume. The effect of good performance, small droplet volume, high resolution and precision

Pending Publication Date: 2018-09-04
UNIV OF SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in drug development and biochemical experiments, sometimes the required samples are very precious, and the precision requirements for liquid samples and reagents are very strict. At present, the existing pipettes are difficult to meet the requirements. Therefore, there is an urgent need for a high-precision pipette. liquid container

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Embodiment Construction

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0041] In order to meet the high-precision requirements, this application provides a high-precision electric pipette, which can automatically absorb a small volume of liquid, and then continuously produce micro-volume droplets, quantitatively absorb the required volume of liquid and generate the required volume. Dispense volume liquid, see figure 1 and figure 2 , the electronic pipette can include:

[0042] Micro air pump 1, solenoid valve 2, displacement d...

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Abstract

The invention discloses an electric pipette comprising a micro air pump for generating negative pressure, a solenoid valve for controlling a pipe connected to a micro-fluidic chip to communicate withthe micro air pump at the time of power on and communicate with the atmosphere at the time of power off, a displacement driver used to give the micro-fluidic chip an impact force through a rigid extension piece to drive liquid in the micro-fluidic chip to be ejected by droplets, the micro-fluidic chip for sucking, storing and ejecting liquid, and a control system for controlling the working statesof the micro air pump, the solenoid valve and the displacement driver, wherein the micro-fluidic chip is internally provided with a cavity which is used for storing liquid and can be knocked; the micro-fluidic chip is provided with a micro-injection hole in communication with the cavity through a micro pipe, and the micro-injection hole satisfies the condition that liquid in the micro-fluidic chip has a self-locking property. The droplets generated by impact are small in size and good in consistence. The size of dispensed liquid is determined by the size of a single droplet and the frequencyof impacts together, and therefore, the electric pipette has higher resolution and precision.

Description

technical field [0001] The invention relates to the technical field of measuring instruments, in particular to a high-precision electric pipette for absorbing and distributing trace amounts of liquid. Background technique [0002] In medical, pharmaceutical, gene and protein research, biological research, drug development laboratories, and other biotechnology applications, it is often necessary to use pipettes to manipulate laboratory samples in various laboratory procedures, mainly using pipettes The device draws a certain volume of liquid into the pipette and then distributes the liquid into desired volumes. [0003] At present, ordinary manual pipettes generally realize the suction and release (dispensing) of liquids by means of piston movement. Electric pipettes usually use a motor or negative pressure pump to change the air pressure in the tip to pump liquid. For example, Chinese patent CN201310485164.3 "Electric pipette and its automatic metering method, automatic li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01L3/00B01L3/02
CPCB01L3/021B01L3/0241B01L3/50273B01L2200/061B01L2400/049
Inventor 李保庆王小杰
Owner UNIV OF SCI & TECH OF CHINA
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